durable than leather. Precautions similar to those
If unpackaged rings are stored for a long period of
applicable to O-rings must be taken to avert
time without the use of mandrels, a condition of
contamination of backup rings and damage to
overlap may develop.
To eliminate this condition,
hydraulic components. Teflon® backup rings may be
stack Teflon® rings in a mandrel of a diameter
stocked in individual sealed packages similar to those
comparable to the desired diameter of the spiral ring,
in which O-rings are packed, or several may be
Stack and clamp the rings with their coils flat and
installed on a cardboard mandrel.
parallel.
Then place the rings in an oven at a
Figure 2-47.—O-ring installation.
2-36
